test: data router, one render helper, fetchRoutes in every test

src/pages/SettingsPage.steamToast.test.jsx

@@ -1,11 +1,10 @@
 // @vitest-environment jsdom
 import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest';
-import {act, cleanup, render, screen} from '@testing-library/react';
-import {MemoryRouter} from 'react-router-dom';
+import {act, cleanup, screen} from '@testing-library/react';
 import {toast} from 'sonner';
 import SettingsPage from './SettingsPage.jsx';
-import {PreferencesProvider} from '../context/PreferencesContext.jsx';
-import {CurrentUserProvider} from '../context/CurrentUserContext.jsx';
+import {fetchRoutes, json} from '../test/fetchRoutes.js';
+import {renderWithProviders} from '../test/renderWithProviders.jsx';
 
 // Like react-i18next: a language change re-renders every subscriber with a fresh `t`.
 vi.mock('react-i18next', async () => {
@@ -33,9 +32,11 @@ const profile = {
 describe('SettingsPage Steam toast', () => {
     beforeEach(() => {
         localStorage.setItem('tbp_session', '1');
-        globalThis.fetch = vi.fn(async (url, init) => (init?.method && init.method !== 'GET'
-            ? {ok: true, status: 204, json: async () => { throw new SyntaxError('no body'); }}
-            : {ok: true, status: 200, json: async () => profile}));
+        fetchRoutes({
+            'GET /api/users/me': json(200, profile),
+            'POST /api/auth/refresh': {ok: true, status: 204, json: async () => { throw new SyntaxError('no body'); }},
+            'GET /api/version': json(404, {}),
+        });
     });
 
     afterEach(() => {
@@ -45,7 +46,7 @@ describe('SettingsPage Steam toast', () => {
     });
 
     it('shows the linked toast once, also after a language change', async () => {
-        render(<MemoryRouter initialEntries={['/settings?steam=linked']}><PreferencesProvider><CurrentUserProvider><SettingsPage/></CurrentUserProvider></PreferencesProvider></MemoryRouter>);
+        renderWithProviders(<SettingsPage/>, {path: '/settings', entries: ['/settings?steam=linked']});
         await screen.findByText('SETTINGS.STEAM_LINK.VERIFIED');
         expect(toast.success).toHaveBeenCalledTimes(1);